Lag Baomer isnt from Chazal
” it is very curious why the Rabbanut should feel that they know better.”
They learnt from chazal who pushed off D’oraysas (shofar, Lulav) For POSSIBLE chilul shabbos Al achas kama vekama for a (relatively) new minhag that isnt deoraysa, isnt derabanon. Some opposed it it all the time should be pushed off for Vadai chilul shabbos .
now if lighting at 3 AM works. Great! there is no problem