Question / Help Microphone delay instream

[Xeph]

Hi, I have two mics, usb and xlr, which I use while streaming. The xlr mic starts to delay in stream and with usb mic also working sound gets echo. Mic placements are not the issue because this delay happens sometimes in mid stream.
How I semi solve this problem is muting for a few minutes and unmuting. After this process delay stops but may or may not start again.
Usb mic is plugged to pc and xlr mic is plugged to akai pro external sound card. I'm using latest version of OBS.
Please help me to solve this delay problem. I'll provide more info if you need. Thanks in advance.

 

[carlmmii]

Have you tried disabling device timestamps for the audio sources?

Also, in general it's bad practice to have multiple audio sources with the same audio coming over, for that exact reason. They need to be maintained within ~5ms tolerance, and even then you introduce heavy mechanical-sounding interference patterns.

 

[Xeph]

I went on a bussines trip for a week so I can't check if I disabled timestamps or not but if any of you have an idea about what may cause this please write so I can check all of them when I return and will write which one is correct for me. Thanks in advance.