Cracking sound in "my pet dungeon" mode

Hello! I found a problem with sound in "my pet dungeon" mode (maybe this problem exists in other modes): if I have many units and send them to attack enemy wave, sound begins cracking. Looks like performance issue.

Core Information

• My platform
  • OS Windows
  • 10
  • 64 bit
    
    • Ram - 32GB
    • CPU - Intel core i7 7700K
    • GPU - Nvidia RTX 2080 (driver version 471.41)
    • Sound card - Creative SB ZxR (driver version 6.0.102.75, SB command 3.5.2.0)
• WFTO build 2.0.8f7
• My pet dungeon mode, all maps
• output log is outdated for some reason (file from 2019 year)