Get the wrong volume size for the U disk

below is the /proc/self/mountinfo info: exceptional_mountinfo.txt

While the docker service started I found the U disk displayed with a wrong volume size, details marked as figure1. But stopped the docker service, the U disk display the right volume size soon, details marked as figure2. to get the U disk's mounted storage we used the Qt interface, but there are two different values for the same U disk,  I think this is a bug.

figure1: while docker started, get the wrong volume size for /dev/sdb1 block device

figure 2: stopped the docker service, can get the right value soon.