Playback on V1 cam is 1/3 frame per second

I have issue on all three V1 cams where playback is 1 frame every 3 seconds (live is fine). This just recently occurred after latest version of app was installed. My V2 cam is working fine on live and playback. BTW—On one phone where app was not updated --all cams work. Similar issue, affecting live and playback, occurred in a June app update which took months to fix. I give up. Was considering a WYZE lock --now will not buy WYZE lock. Thanks