Hello,
for Keil Studio is there new section, so please use it - Latest Keil Studio topics - Arm Mbed OS support forum
Or edit your post and change the section (it is working only for limited time) how is description in post below
I tried it and I did not faced descripted issue.
Tested with a fork of MbedOS 6.15 and another fork of MbedOS 5.15 with bera metal profile (for shorter compilation).
BR, Jan