Earlier this year you mentioned about Lauterbrunnen trains and repair work in May and may not still be working in July?? Do you know about this situation for this area in mid July?
Not sure where you heard that, but it's not accurate. Everything in the area is fully running in July.
I do not know who "you" is, but as far as I can tell, trains are running normally between Interlaken Ost and Lauterbrunnen.
You can see for yourself for your dates at www.sbb.ch/en
I live here, and can tell you that everything is operating. Also there was actually never an interruption on public transport. Cable cars do shut down for a few weeks once the Ski season is over for maintenance, but that is all.