TLDR - 1 case that seems to contradict what I described. 1 case that is uncertain. And 2 that I have difficulty interpreting any other way.
some erotica gd posted approximately every month, ch17 18/03/2022, ch18 13/04/2022 (a month later), a new group picked it up and posted ch19.1 at 05/09/2022 (~5 months had passed), and gd posted ch19 at 15/09/2022 (10 days after) and then a third group ch20 17/01/2024 (3+ months later)
I would argue they just stuck to their schedule here, then potentially even dropped it in favour of the new group after posting the scheduled one and noticing. So opposite of what I described before.
romcom gd posted ch1.2 12/01/2023, ch2.1&2.2 (07&08)/12/2023 (~1 year), second group posted ch1 29/12/2023 (~20 days after, explicitly mentioning in credits that they had been working on it for a while and 2.1 came during translation ("almost 10[8?] months" after 1.2, meaning they would've started ~2 months before 2.1 appeared?)), gd posted ch3 30/12/2023 (the very day after), then ch4 (6 days later), second group ch2 12/01/2024 (7 days later) and gd ch5 19/01/2024 (7 days later, 14 days after ch4).
This can very likely just be a case of a dropped title getting resumed a year later independently and unknowing of the other party having picked it up 2 months prior. Though the timestamps of 3, 4, 5 does seem slightly suspect (The very day after? and very irregular schedule if still independent). Still, I would believe it was just a coincidence if such was claimed.
isekai this had multiple possible occurences, but I only looked at the first occurence (~ch6.3) where 6.1 and 6.2 had been 14 days apart, but 6.3 hadn't appeared in 1-2 months. Second group posted 7.1 and then 6.3 same day, Then 10 minutes after 6.3, gd posted 6.3 too. 7.1 came 1 day later.
This looks to me like a clear-cut example of what I described before.
then there's always this one I think I first noticed it through this one? Though arguably rightdark is intentionally provoking galaxy to post their stockpile by triggering this behaviour by posting poor-quality translations few(? citation needed) wants to read anyway.