I thought S4 would have a bigger time jump than it did, based on initial reports. S5 time jump was inevitable. They've been filming S4 for 3 years.
That's actually not true. While there were numerous delays, COVID etc, aside from filming for 2 weeks in early 2020 before the pandemic hit, the entirety of S4 was filmed over a one year period between September 2020 and September 2021.