(Possible routing) issue with bath tubs and washing toddlers

Hi, sorry if this isn't the right spot or if this has been addressed somewhere else; the search wasn't coming up with anything that I could find, but I could be missing something.

I've had the issue of my sims not being able to bathe a toddler (both in cc tubs and maxis tubs, both inside and outside, both flush with a wall and with nothing around, and tried with both parents) for weeks now. I ran the batch fix for Island Living tubs already, ofc. The adult sim will get to the queue action and then just wave and show the routing-issue speech bubble, and this happens every time. Before sometime in either June or July, I'd say, I never had any problems with this. I've re-run the batch fixes through S4S to fix any post-island-living tub glitches, but it hasn't helped, it seems. Deleted the usual cache files, too.

There's no babies on the lot, and I've cancelled the toddler's queued actions. Does anyone have any idea what I could do with this? It's really interfering with gameplay since the toddler just... stays stinky and upset. I'm not getting any errors or exceptions, either (at least not through MCCC). :(

Thanks in advance!