QLibrary doesn't load() after a previously failed load()

openat(AT_FDCWD, "/usr/lib/libsocketcan.so", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
munmap(0x76f73000, 13287)               = 0
openat(AT_FDCWD, "/usr/lib/libsocketcan", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = 4
statx(4, "", AT_STATX_SYNC_AS_STAT|AT_NO_AUTOMOUNT|AT_EMPTY_PATH, STATX_BASIC_STATS, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=13287, ...}) = 0
mmap2(NULL, 13287, PROT_READ, MAP_PRIVATE, 4, 0) = 0x76f73000
close(4)                                = 0
openat(AT_FDCWD, "/lib/libsocketcan", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/libsocketcan", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
munmap(0x76f73000, 13287)               = 0
openat(AT_FDCWD, "/usr/lib/socketcan.so", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = 4
statx(4, "", AT_STATX_SYNC_AS_STAT|AT_NO_AUTOMOUNT|AT_EMPTY_PATH, STATX_BASIC_STATS, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=13287, ...}) = 0
mmap2(NULL, 13287, PROT_READ, MAP_PRIVATE, 4, 0) = 0x76f73000
close(4)                                = 0
openat(AT_FDCWD, "/lib/socketcan.so", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/socketcan.so", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
munmap(0x76f73000, 13287)               = 0
openat(AT_FDCWD, "/usr/lib/socketcan", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = 4
statx(4, "", AT_STATX_SYNC_AS_STAT|AT_NO_AUTOMOUNT|AT_EMPTY_PATH, STATX_BASIC_STATS, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=13287, ...}) = 0
mmap2(NULL, 13287, PROT_READ, MAP_PRIVATE, 4, 0) = 0x76f73000
close(4)                                = 0
openat(AT_FDCWD, "/lib/socketcan", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/socketcan", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
munmap(0x76f73000, 13287)               = 0
write(2, "qt.canbus.plugins.socketcan: Unk"..., 43qt.canbus.plugins.socketcan: Unknown error
) = 43
write(2, "qt.canbus.plugins.socketcan: Can"..., 119qt.canbus.plugins.socketcan: Cannot load library libsocketcan, some functionality will not be available.
Unknown error
) = 119
write(2, "after create\n", 13after create
)          = 13
socket(AF_CAN, SOCK_RAW|SOCK_NONBLOCK, CAN_RAW) = 4
ioctl(4, SIOCGIFINDEX, {ifr_name="can0", ifr_ifindex=2}) = 0
bind(4, {sa_family=AF_CAN, sa_data="\0\0\2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"}, 24) = 0
setsockopt(4, SOL_CAN_RAW, CAN_RAW_LOOPBACK, [1], 4) = 0
setsockopt(4, SOL_CAN_RAW, CAN_RAW_RECV_OWN_MSGS, [0], 4) = 0
setsockopt(4, SOL_CAN_RAW, CAN_RAW_ERR_FILTER, [536870911], 4) = 0
setsockopt(4, SOL_CAN_RAW, CAN_RAW_FD_FRAMES, [0], 4) = 0
write(2, "qt.canbus.plugins.socketcan: Fun"..., 74qt.canbus.plugins.socketcan: Function can_set_bitrate() is not available.
) = 74
write(2, "qt.canbus.plugins.socketcan: Can"..., 75qt.canbus.plugins.socketcan: Cannot apply parameter: 4 with value: 500000.
) = 75
write(2, "config\n", 7config
)                 = 7
write(2, "qt.canbus.plugins.socketcan: Fun"..., 74qt.canbus.plugins.socketcan: Function can_set_bitrate() is not available.