This could be normal, depending on the parentage of your hybrid.
The large flower Cattleya with autumn/winter rest (trianae, schroederae, lawrenceana, mossiae, mendelii...) and Cattleya (Laelia) from crispae section, fill their (green) sheath after several months. Now, trianae/schroederae are in bloom or with buds in the sheath. Buds will appear in February/March/April for lawrenceana, mossiae, mendelii, purpurata...
Some others fill their sheath when growing the new PB or just after the growth of the new PB (gaskelliana, lueddemanniana, warscewiczii, warneri, rex...). Now at home, new PB begin to grow for gaskelliana, are already well developed for warneri.
The Guarianthe fill their sheath after several months even if the sheath seems to be dried.
In principle, the hybrids are more tolerant. And therefore less sensitive to the lack of respect for the rest period needed for some species.
I hope this help you.