USB reciever keyboard and mouse lagging

So I've a keyboard and a mouse (wireless) connected to my mac mini

It's connected with a USB 2.0 Male dongle, and both the keyboard and the mouse send and recieve signals through that one dongle.

the mouse lags a lot, the keyboard still works fine most of the time.

I tried using a usb 2.0 male mechaical keyboard (wired)

and it works fine and no issues, I had a wired mouse too but it didn't work with the mac

I tried booting into safe mode and the problem was still there.

I tried using my keyboard and mouse with my Windows PC and also tried it in Linux, and it worked fine.

the battery of the keyboard and the mouse is 100%. I tried SMC reset, safe boot, none of them worked.

I tried using the mouse with bluetooth connection and it still lagged after a random interval but it was there.

what can be the reasons for this?

few things which had happened in the past :

My mac mini was unplugged (in total, it happened for two times) while it was Idling.