This is still happening when exporting as .svg but under different circumstances. I’ve isolated it down to being text related. If I attempt to mask text with another object, to make for instance a ‘T’ half black and half white it doesn’t export and just hangs like in earlier bug reports. If I check “Export text as curves” it creates curves from the text, but it also removes the masking object in the hierarchy under the text object and the export ends up looking different than intended. As of right now the only fix is to break the object hierarchy, manually create curves from text, and put back the masking object, which is incredibly tedious and inflexible.