Inconsistency of texts (text set in the date input and displayed text) with distance field rendering disabled

Test 1:
PRECONDITIONS:
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Line 13 in main.cpp (qputenv("Q3DS_DISTANCE_FIELD_DISABLED", "1") is not commented.

STEPS TO REPRODUCE:
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1. Press key 0 ->each press increment the current value by 1 ( 0 -> 1 -> 2 -> 3 -> 4 ... etc) to 20

2. Press key 1 -> each press decrement the current value by 1 ( 20 -> 19 -> 18 -> 17 -> 16 ... etc) to 0

EXPECTED RESULT:
During step 1, should be displayed each new value is equal previous value + 1
During step 2, should be displayed each new value is equal previous value - 1

ACTUAL RESULT:
During step 1, for some values displayed random number
During step 2, for some values displayed random number 

Please refer to video for better understand.
Console log contains Current Number that set to data input.

Test 2:
PRECONDITIONS:
------------------------------
Line 13 in main.cpp (qputenv("Q3DS_DISTANCE_FIELD_DISABLED", "1") is commented.

STEPS TO REPRODUCE:
------------------------------
1. Press key 0 -> each press increment the current value by 1 ( 0 -> 1 -> 2 -> 3 -> 4 ... etc) to 20

2. Press key 1 -> each press decrement the current value by 1 ( 20 -> 19 -> 18 -> 17 -> 16 ... etc) to 0

EXPECTED RESULT:
During step 1, should be displayed each new value is equal previous value + 1
During step 2, should be displayed each new value is equal previous value - 1

ACTUAL RESULT:
During step 1, each new value is equal previous value + 1 (OK)
During step 2,each new value is equal previous value - 1 (OK)

Video and Test app is attached.