Arrapago Remnants

[Cerien]

I can enter all others but this area says only once an earth day. Is this a glitch? I am 1 Armored Chariot kill away from finishing my Tizona trial, and I can complete the next 3 trials directly after, so this is holding me up. Thanks for any help in advance.

[Jakuk]

Made sense at the time as it was always packed, now not so much.