previously I had installed routeros 6.47.7 on my crs309 and had only one bridge. now the need arose to create another bridge, and in this second bridge the ports do not go up with hardware offload, already reviewed the rconfigurations and are identical to bridge 1, already upgraded to 48.3 and nothing. would it be a limitation to just offload hardware on just one bridge?

Yes, only one bridge is hardware offloaded per the docs

https://help.mikrotik.com/docs/display/ ... s+switches

This is a switch and you should really be using vlans, not extra bridges.