You didn't exactly understand the problem.
Here I will leave 2 GIFs.
https://c.radikal.ru/c42/2103/e3/8b634b070c89.gif this is the current Maelstrom sea rendering.
https://b.radikal.ru/b20/2103/d6/da6286efe626.gif and this is vanilla COAS.
As you might see, in Maelstrom sea the shadows bumps are not... animated. Those are not shadows of sea objects, but sea waves themselves.. On current MS engine version they are static and are not moving. Checked on COAS and ERAS addons with current MS.
Can be seen in both 32 and 64 bit version of DX9 Maelstrom.