I took a couple of weeks off at the first of the year - my body needed a break.
I realized that I'd starting reaching failures in most of my lifts (OHP, BP, and DL), and, even when I wasn't dropping reps, I was needing 5-7 minutes between sets. At that point, my highest completed 5x5 sets were:
SQ: 370
BP: 210
ROW: 215
OHP: 140
DL: 355
I was at or just past the PRs I'd set during my first run through SL 5x5, but workouts were taking me almost 2 hours with all the time I needed between sets. So, I decided to switch everything to 3x5 and did a pretty big deload on most of the lifts.
I'm now at:
SQ: 345 3x5
BP: 205 3x5
ROW: 205 3x5
OHP: 145 3x5
DL: 335 3x5
I also cut out some of the (rather extensive) warmup sets from the app. I now typically do any warmup multiples of 45, until it gets below 5 reps for a warmup set, and then follow the app - with the exception of OHP and DL, where I can still feel fatigue limit my reps (one repaired and one un-repaired shoulder on the OHP, and grip strength on DL). On those, I just do what feels necessary that day.
TL;DR: Weights got heavy, had to switch to 3x5 to keep workouts at a "I get to eat dinner with my wife" duration.