Until Lola can be trusted to not go somewhere in the house throughout the night, it is my suggestion that she be confined to an area. That area may be your bedroom, or a crate, or in the case of my larger dogs, the laundry room.
I don't think Lola "knows" she is doing something wrong. Perhaps she understands that for the most part, toileting outside is desired. While we think that dogs sometimes do these things deliberately, they really don't. My Black Lab, Sally, was well house trained, BUT, if left unattended no matter how old she became, she would "sneak" into a room and do her business in a corner. This would happen only if I was away, and whomever was left at home didn't pay attention. Perhaps it was her way of protesting my absence...I just contradicted myself.
The thing is with Sally, we all KNEW she would do that, if given the chance!
My Golden, Emma, would NEVER do that. The only time she had an accident would be entirely my fault, and usually from medication such as Prednisone. I found that when I had to leave the house, even to do a grocery shop (as I am a "stay at home" Mum), Sally always had to "go to bed" (in the Laundry room) with Emma. She wouldn't have accidents in there.
Being ill never counts as an "accident", whether it's from medication or from something they ate, or a bug of some sort.
With Lola it sounds like these accidents are only happening when the opportunity presents itself. Eliminate the opportunity, and you will eliminate the accidents. Clearly, Lola can't have "free roam" at night.
Other than that, you are doing exceptionally well!!! You can use these same "tactics" if and when you travel with Lola.
There are very few areas of "training" when it comes to dogs that I would say I have been a success. House training is perhaps my best one! I can also teach basic commands, and acceptable "play behaviour", but I don't do circles, and jumps, or "play dead" or any of those things. I have successfully been able to teach my large breed dogs, and my small breed dogs, and a few in between.
I'm so glad you posted an update. Keep up the good work Lee, and please keep us informed. It helps us to receive feedback as we do learn from one another.
Hugs to Lola! ♥