We found that the music background of one of our projects was not being restored after minimizing and maximizing the game in mobile Safari with iPadOS 14.4.2 on an iPad Air 3rd Gen. This is a random bug and sometimes the music pauses/resumes correctly but if you repeat this process many times you can hear the sound not being restored eventually.
https://drive.google.com/drive/u/0/folders/1t3PBpqPUjzfNRIXDMxfiu5gDK5UFFsD0
Is this a known issue? We are attaching a video of the issue.
This can be reproduced with the standard demos.