group comparison page crashes when re-selecting a group

[tmazor]

User reported issue:
https://groups.google.com/g/cbioportal/c/ldtNctgyXKo

I am able to reproduce this by going to the URL below, deselect Unaltered Group, the page prompts you to select another group, and then reselect Unaltered Group. The page crashes.

https://www.cbioportal.org/results/comparison?cancer_study_list=paad_tcga_pan_can_atlas_2018&Z_SCORE_THRESHOLD=2.0&RPPA_SCORE_THRESHOLD=2.0&profileFilter=mutations%2Cstructural_variants%2Cgistic&case_set_id=paad_tcga_pan_can_atlas_2018_cnaseq&gene_list=SMAD4&geneset_list=%20&tab_index=tab_visualize&Action=Submit&comparison_subtab=alterations&exclude_germline_mutations=true&comparison_selectedEnrichmentEventTypes=%5B%22missense%22%2C%22missense_mutation%22%2C%22missense_variant%22%2C%22indel%22%2C%22nonframeshift%22%2C%22inframe%22%2C%22inframe_del%22%2C%22inframe_deletion%22%2C%22in_frame_del%22%2C%22in_frame_deletion%22%2C%22nonframeshift_deletion%22%2C%22inframe_ins%22%2C%22inframe_insertion%22%2C%22in_frame_ins%22%2C%22in_frame_insertion%22%2C%22nonframeshift_insertion%22%2C%22truncating%22%2C%22feature_truncation%22%2C%22nonsense_mutation%22%2C%22nonsense%22%2C%22stopgain_snv%22%2C%22stop_gained%22%2C%22frameshift%22%2C%22frameshift_variant%22%2C%22frame_shift_del%22%2C%22frameshift_deletion%22%2C%22frame_shift_ins%22%2C%22frameshift_insertion%22%2C%22translation_start_site%22%2C%22initiator_codon_variant%22%2C%22start_codon_snp%22%2C%22start_codon_del%22%2C%22de_novo_start_outofframe%22%2C%22nonstop_mutation%22%2C%22stop_lost%22%2C%22splice_site%22%2C%22splice%22%2C%22splicing%22%2C%22splice_site_snp%22%2C%22splice_site_del%22%2C%22splice_site_indel%22%2C%22splice_region_variant%22%2C%22splice_region%22%2C%22HOMDEL%22%5D&comparison_selectedGroups=%5B%22Unaltered%20group%22%2C%22Altered%20group%22%5D