To expand on what Walter said, the sequence of events is completely different in the manga.
Rickert is staying with the wounded as part of a second group that the main group is supposed to meet with after the rescue operation. But they are chanced upon by both the Count and Rochine (who are headed to the location of the Eclipse). Predictably, they all get massacred, with Rickert only surviving because the Skull Knight swoops in to protect him. This happens while Guts, Casca and the others are entering the Tower of Rebirth.
The next day, Rickert is shown leaving that group of travelling performers, as they've reached the area where he expects to find his comrades. What's implied from the circumstances and the dialogue is that they found him along the side of the road, alone and shaken, and offered to take him with them so he'd reach his destination faster. More importantly, this is how he first meets Puck, who was with that troupe at the time, and is how he acquires some of his healing powder, which is what saves Guts and Casca's lives after the Eclipse.
Those events make perfect sense and fit nicely together. By contrast, the movie trilogy just shows Rickert being there as the Eclipse ends, and then, separately, we're shown Puck and his group. No relation is established between the two scenes. The Memorial Edition (released in 2022) worsens things by adding back a scene that had been deleted (that Walter mentioned) and that showed Rickert buying "medicinal herbs" at some market (in Wyndham presumably) while talking to a merchant about an escape route "through the mountains".
It furthers distances the two scenes of Rickert and Puck instead of connecting them and also, rather implausibly, introduces this idea of the band needing advice from a random merchant about their escape, despite being pursued throughout the kingdom. Oh and there's also no mountain in sight when they get out from the city, so it makes no sense.