Yes — based on the symptoms, the most likely cause is a problem with the dichromate bleach stage, especially exhausted or contaminated bleach, and possibly incomplete clearing afterward. In black-and-white reversal, the bleach must fully remove the first developed silver so the remaining silver halide can be re-exposed and developed cleanly. If bleaching is weak or uneven, or if dichromate carryover isn’t fully cleared, you can get dark, low-contrast positives and strange colored/greenish artifacts, especially around dense shadow areas.

The greenish tint you noticed after bleach/clearing supports that suspicion. Replenish or remake the bleach and clearing baths fresh, verify times and agitation, and avoid contamination between steps. Also make sure washing between bleach and clearing is adequate. Since one roll processed well and another did not, the chemistry condition or process consistency is a more likely cause than film speed alone.