Rotation for Shadow priest calls for Mind Sear, but does not allow the channel to end before calling for it again, or before calling for another spell. Seems that it should have a CD dial on it as it channels until the channel is finished? At any rate, if followed its a huge dps and resource loss.

++++ SNIP ++++
build: v8.3.0-04-22.04
level: 120 (120)
class: PRIEST
spec: shadow

talents: auspicious_spirits
body_and_soul
legacy_of_the_void
lingering_insanity
misery
psychic_horror
shadow_word_void

azerite: azerite_empowered = 3
chorus_of_insanity = 1
death_throes = 1
earthlink = 2
heed_my_call = 1
impassive_visage = 1
longstrider = 2
searing_dialogue = 2
spiteful_apparitions = 1
thought_harvester = 1

essences: [essence_of_the_focusing_iris] = 3, breath_of_the_dying = 3, memory_of_lucid_dreams = 3, the_crucible_of_flame = 1

sets/legendaries/artifacts: none

gear: ashjrakamas_shroud_of_resolve = 1
breeches_of_faithful_execution = 1
conch_of_dark_whispers = 1
drustthatched_wristwraps = 1
heart_of_azeroth = 1
hyperthread_boots = 1
logic_loop_of_maintenance = 1
loop_of_pulsing_veins = 1
neural_synapse_enhancer = 1
renowned_guild_tabard = 1
vessel_of_skittering_shadows = 1
vile_manipulators_amice = 1
vile_manipulators_cord = 1
vile_manipulators_cowl = 1
vile_manipulators_handguards = 1
vile_manipulators_vestment = 1
wound_dressing = 1

corruptions: deadly_momentum = 3

itemIDs: 158075, 159282, 159463, 159610, 159620, 168964, 168973, 169076, 169223, 173433, 173507, 173812, 173844, 173846, 174237, 44693, 69210

settings: aoe = 3
buffPadding = 0
custom1Name = Custom 1
custom2Name = Custom 2
cycle = false
cycle_min = 6
damage = true
damageDots = false
damageExpiration = 6
damageRange = 0
debuffPadding = 0
enabled = true
gcdSync = true
maxRefresh = 10
maxTime = 33
nameplateRange = 8
nameplates = false
package = Shadow
potion = unbridled_fury
potionsReset = 20180919.1
throttleRefresh = false
throttleTime = false

toggles: cooldowns = false
custom1 = false
custom2 = false
defensives = true
essences = true
interrupts = true
mode = automatic
potions = false

+++ END SNIP +++++

Channeling has been revised for Shadowlands and should address chain channeling and the like. If not, a new ticket is needed.

Please fill out issue tickets accurately and completely. You'll need to post a snapshot when the addon recommends interrupting Mind Sear and you believe it shouldn't.

Looking briefly at the Shadow priority, it appears that there are low priority entries for Mind Sear that are interruptible and higher priority entries that aren't intended to be interrupted. I'll probably need to investigate that a bit, but would appreciate the complete information requested in the ticket instructions to help it along. Thanks.