Bed Temp Low

I wanted to see if others are seeing this / is this normal…

Printing with a 65* bed temp for PLA. Bed gets to 65, then drifts down to 61 while printing starts then slowly keeps stepping up a degree every 5-6 mins. The heating icon goes orange occasionally. I rarely if ever see the bed hit 65 during the print.

I would have assumed it would climb to 65 and stay there the entire time. Ok maybe drop to 64 but immediately heat again to 65.