I'd start with a deload week. From there, I have a few options (Flats has a pretty similar mindset on what I'd do):
1) Roll back a few cycles. I'd only do this if I thought that there was still value I could tap from it. This would also go hand-in-hand with modifying assistance work as appropriate.
2) Switch the lift to a variant. Reprogram that to the proper RPE for starting a new training cycle. I don't think I'd try to program low rep heavier work with dumbbells though.
3) Move into an intense phase.
4) Target training. Focus on increasing 2 big lifts at a time using this system, and put stalled lifts on the backburner temporarily and just maintain. Sub in/out lifts as your focus. Training this way has led to my S/B/D all going up at the same time for the first time in over a year, but realistically that's not a precedent that can continue indefinitely.
I'm thinking of doing a mix of 2 and 4. My deadlift will probably stall out first (it's starting to slow down). I think I'll change it to deficit deads and change the set/rep scheme to do higher rep lower intensity sets, while hammering away at my squat and bench. When my next big lift starts to plateau, I'll reprogram deficits to start a new cycle of volume-based progression, and put the newly-stalled lift on the backburner.
I'd definitely consider implementing option 3 at some point in the future too. I'd program in an intense phase before I hit a plateau though (but at the point where I can start to see it coming). After the intense phase, I'd deload and move to a light, high rep, higher volume phase, before moving back into strength-building.
Also worth trying something totally different. What's the point of lifting if you don't experiment once in awhile?