casino says my alternating columns looked like bonus abuse

Was running a pretty basic roulette strategy last week just flipping between first and third columns, but not in any kind of pattern I’d call abusive. I just don’t play the middle much, feels like dead space to me. Made use of a deposit bonus, nothing massive, and kept my bet sizing within what most people would call normal. Now the casino flagged my withdrawals and says the way I alternated columns looked like bonus abuse. Support even sent this copy-paste about “irregular play.”

I get that they gotta watch for bots, but is this actually something they care about or are they just being stingy with their promos lately? Anyone here ever have issues for legit, low-tech column swaps? Trying to figure out if it’s worth pushing back or if this is the new normal.