Same for me.

Heatwave window approaches, no one wants to pre-farm. Heatwave occurs, a group or two form, gather together and finally kill maybe 8 or 9 moths then immediately run off for a lv35 fate. Heatwave ends. Next Heatwave 347 minutes. Have more crystals than I need and can't farm light until I get past the roadblock.

Not sure why the light farm is tied to a completed relic this time either, in Pagos you could start farming light well in advance from lv25.