Zweiter russischer Hubschrauber innerhalb von 24 Stunden verloren.

With usuql caveats on the source this suggest a change in either Russian or Ukrainian tactics that has seen these placed more ‚at risk‘.

It could be something mostly on the Ukrainian side that brings a combination of improvement in detection and the range of interdicrion by drones which has further improved and is now more threatening to helicopters loitering at ranges behind the lines that they were typically safe before.

Or

The Russians are pushing their most valuable helicopter assets forwards and into more dangerous positions to effect change either defensively in response to Ukrainian successes or offensively desperately trying ro support localised mechanised assault.

Based only on the proximity to the front suggested here it feels more likely the immediate change is the latter of the 2 main options as the other has presumably been in place a little while now but perhaps someone else can piece together evidence of what was happening on the ground over the last few days at the sites of both shoot downs.