Out of the total shares TBM has 125 stale shares so that is about 2% (125/5700)
Try out with High Difficulty Port. Otherwise; switch the Pool, or reduce Memory OC. On Binance (

) i had >2% staleshares too, and now mining somewhere else Shiba INU for ETHash, and guess what happens,..
https://i.imgur.com/GcSYCOH.png