The bug is that when a tier is about to wrap
(increase in height), especially on mobile it will loop the drop preview
for the lower and upper tier till the page crashes.
Example crash page (user report): /tier-list-maker?type=stage-mode&canAddDuplicates=false&state=('Vs!%5BHxJXj4655_sJSj8c42_aJAjd23f_bJBGbfe84d_cJCG5dbb63_wJDG20b2aa_zJFG4169e1W~VItems!%5B%5B'V-zK0O1-SZEwK1k3O5O4q4k5u5PEcK1q1u4u4O3q6O5q6QEbK0k2u2QEaK2O3k6PEsK0u2k6UExK0q3Uv%5D)*('typehstage-mode'~idh.')%2CEvY'V-G'~colorh%23H('idhV-J'~namehK'Y*L1775494063N.*O-SZNP-TCQ-CBU-RMVtierW')%5DY%2C%5B_.Hh!'jGffkPNqQNuUNvW%5DwL330zL553%01zwvuqkjh_YWVUQPONLKJHGE.*_
